#include <stdio.h>
#include <math.h>
#define DISP(f,x) printf(#f"(%g) = %g\n", x, f(x))
#define DISP2(f,x,y) printf(#f"(%g,%g) = %g\n", x, y, f(x,y))
int main(void)
{
    DISP(sqrt, 3.0);
    DISP2(hypot, 3.0, 4.0);
    return 0;
}